gcc45-pkgbuild-build-chost.patch

--- PKGBUILD.orig	2016-06-07 12:22:39.833418761 +0100
+++ PKGBUILD	2016-06-07 13:42:49.653850504 +0100
@@ -3,7 +3,6 @@
 # Contributor: Tianjiao Yin <ytj000(at)gmail(dot)(see)(oh)(em)>
 # Contributor: Allan McRae <allan@archlinux.org>
 
-set -u
 pkgname='gcc45'
 pkgver='4.5.4'
 pkgrel='3'
@@ -24,7 +23,6 @@
             '2d369cf93c6e15c3559c3560bce581e0ae5f1f34dc86bca013ac67ef1c1a9ff9')
 
 prepare() {
-  set -u
   cd "gcc-${pkgver}"
 
   # Do not install libiberty
@@ -36,7 +34,7 @@
   patch -Np0 -i "${srcdir}/gcc-hash-style-both.patch"
 
   case "${CARCH}" in
-  'x86_64') patch -Np1 -i "${srcdir}/gcc_pure64.patch"; false;;
+  'x86_64') patch -Np1 -i "${srcdir}/gcc_pure64.patch";;
   esac
 
   echo "${pkgver}" > 'gcc/BASE-VER'
@@ -48,6 +46,7 @@
   cd 'build'
 
   ../configure \
+      --build=${CHOST} \
       --prefix='/usr' \
       --mandir='/usr/share/man' \
       --infodir='/usr/share/info' \
@@ -68,19 +67,15 @@
       --with-ppl \
       --with-system-zlib \
       CXX='g++-4.9' CC='gcc-4.9'
-  set +u
 }
 
 build() {
-  set -u
-  cd "gcc-${pkgver}"
+  cd "gcc-${pkgver}/build"
   local _nproc="$(nproc)"; _nproc=$((_nproc>8?8:_nproc))
   make -j "${_nproc}"
-  set +u
 }
 
 package() {
-  set -u
   cd "gcc-${pkgver}/build"
 
   make install DESTDIR="${pkgdir}"
@@ -96,6 +91,4 @@
   mkdir -p "${pkgdir}/opt/gcc-4.5"
   ln -s '/usr/bin/gcc-4.5' "${pkgdir}/opt/gcc-4.5/gcc"
   ln -s '/usr/bin/g++-4.5' "${pkgdir}/opt/gcc-4.5/g++"
-  set +u
 }
-set +u